Treatment Liquid Composition For Ink Jet Textile Printing
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Solution Overview
Problem
Current ink jet textile printing methods using dye inks face challenges with bleeding and color development, particularly due to the need for high viscosity pretreatment liquids and subsequent steaming, which complicates the application and stability of dye inks in ink jet systems.
Innovation Solution
A treatment liquid composition for ink jet textile printing comprising urea, sodium chlorate, polyethylene glycol with a specific molecular weight, and water, which suppresses bleeding and enhances color development without increasing viscosity, thereby improving printing stability and allowing for continuous ink jet application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pretreatment liquid is applied to suppress bleeding and improve color development, then color development and bleeding suppression are improved, but the process requires drying between treatment liquid application and ink application, increasing energy consumption and process complexity
Solution Approach 1:
The patent combines the treatment liquid application and ink application into a single ink jet pass, eliminating the need for intermediate drying. The treatment liquid and ink are applied simultaneously or in rapid succession without requiring the fabric to be dried between steps, thus merging two previously separate processes into one integrated operation.
Solution Approach 2:
The treatment liquid is applied in advance to the fabric before ink application, preparing the fabric surface to suppress bleeding and enhance color development. The treatment liquid contains specific components (polyethylene glycol, urea, sodium hydroxide, sodium chlorate) that are applied preliminarily to modify the fabric surface properties, allowing subsequent ink to be deposited with improved characteristics.
2Ease of manufacture
If an exclusive apparatus is used for pretreatment, then color development and bleeding suppression are improved, but the device complexity and process steps increase
Solution Approach 1:
The ink jet apparatus is designed to perform multiple functions: it can apply both the treatment liquid and the ink in the same pass. This multi-functional capability eliminates the need for a separate dedicated pretreatment apparatus, reducing device complexity while maintaining the benefits of treatment liquid application for bleeding suppression and color development.
3Ease of manufacture
If dye ink is used to obtain bright color development, then color development is improved, but bleeding phenomenon occurs
Solution Approach 1:
The treatment liquid acts as an intermediary between the fabric and the dye ink. It contains specific components (polyethylene glycol, urea, sodium hydroxide, sodium chlorate) that modify the fabric surface properties, creating conditions that allow bright color development while suppressing the bleeding phenomenon. The treatment liquid mediates the interaction between the dye ink and fabric to achieve both goals.
Solution Approach 2:
The treatment liquid changes the chemical and physical parameters of the fabric surface through its composition (polyethylene glycol, urea, sodium hydroxide, sodium chlorate). These parameter changes in the fabric surface properties enable the dye ink to deposit with bright color development while preventing bleeding, by modifying surface tension, wettability, and other critical parameters.
4Object-generated harmful factors
If treatment liquid and ink are adhered separately requiring drying, then bleeding suppression is improved, but productivity decreases due to repeated drying steps
Solution Approach 1:
The ink jet apparatus performs continuous printing by applying both treatment liquid and ink in the same pass without interruption for drying. This continuous operation maintains high productivity while achieving bleeding suppression, as the treatment liquid and ink are deposited in rapid succession during a single continuous printing process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition effectively suppresses bleeding and improves color development and printing stability, reducing the need for steaming and heat energy, while maintaining suitable viscosity for ink jet methods.
Implementation Method 1
polyethylene glycol having a molecular weight of over 1000 and less than 10000
Implementation Method 2
urea, sodium chlorate, polyethylene glycol having a molecular weight of over 1000 and less than 10000
Data Source
AI summary
A treatment liquid composition for ink jet textile printing includes urea, sodium chlorate, polyethylene glycol having a molecular weight of over 1000 and less than 10000, and water.